diff --git a/calc.py b/calc.py
index dc8d894..64a5f29 100644
--- a/calc.py
+++ b/calc.py
@@ -1,10 +1,10 @@
-def add(x,y):
-    return x + y
+def add(x,y,p):
+    return x + y + p
 def subtract(x,y):
     return x - y
 def multiply(x,y):
     return x * y
-def divide(x,y):
-    return x * y
+def divide(x,y,z):
+    return x * y *z
 def square(x,y):
     return (x*x + y*y)